Op rod catch assembly- Early or Late type?

[Captain Bob]

I'm trying to find out the difference between the "Early" or "Late" type operating rod catch assembly. Does anyone know? I have a Garand and the accelerator is smooth on the edge. The bolt does not release when a loaded clip is inserted. I swapped it from another M-1 (accelerator has a raised edge on it) and the bolt releases properly.
I'd like to replace the accelerator but no one seems to sell just that part, you have to buy the whole catch assembly and they advertise "Late" or "Early" and I don't know which is which. I believe the op rod and the catch assembly are mismatched.

[RCS]

SA changed the design of the op rod catch near the end of the gas trap production in 1940. The lip on the accelerator was introduced in mid 1942 by SA

[Orlando]

It is normal to have to assist the bolt to close on the first round on a properly functioning rifle. A rifle that the bolt closes by itself is usually signs of a rifle that has worn parts. If all parts are in spec your rifle should function fine with either type accelerator